Thread#to_s

static VALUE
rb_thread_to_s(VALUE thread)
{
    VALUE cname = rb_class_path(rb_obj_class(thread));
    rb_thread_t *target_th = rb_thread_ptr(thread);
    const char *status;
    VALUE str, loc;

    status = thread_status_name(target_th, TRUE);
    str = rb_sprintf("#<%"PRIsVALUE":%p", cname, (void *)thread);
    if (!NIL_P(target_th->name)) {
        rb_str_catf(str, "@%"PRIsVALUE, target_th->name);
    }
    if ((loc = threadptr_invoke_proc_location(target_th)) != Qnil) {
        rb_str_catf(str, " %"PRIsVALUE":%"PRIsVALUE,
                    RARRAY_AREF(loc, 0), RARRAY_AREF(loc, 1));
    }
    rb_str_catf(str, " %s>", status);

    return str;
}